.btn_a_blue {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: bold;
    color: #fff;
    background-color: #007bff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}
.btn_a_blue:hover {
    background-color: #0056b3;
}
.btn_a_blue:active {
    background-color: #004080;
}
.btn_a_pink {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: bold;
    color: #fff;
    background-color: #ff69b4;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}
.btn_a_pink:hover {
    background-color: #ff1493;
}
.btn_a_pink:active {
    background-color: #ff007f;
}
.btn_a_black {
    background-color: #000;
    color: #fff;
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}
.btn_a_black:hover {
    background-color: #333;
}
.btn_a_black:active {
    background-color: #666;
}
.btn_a_yellow {
    background-color: #ffcc00; /* 设置背景颜色为黄色 */
    color: #ffffff; /* 设置文字颜色为白色 */
    padding: 10px 20px; /* 设置内边距 */
    border: none; /* 移除边框 */
    border-radius: 4px; /* 设置圆角 */
    cursor: pointer; /* 设置鼠标样式为手型 */
}

.btn_a_yellow:hover {
    background-color: #ffd633; /* 设置鼠标悬停时的背景颜色 */
}

.btn_a_yellow:active {
    background-color: #ffa500; /* 设置按钮按下时的背景颜色 */
}
